| MA Gangfeng,LIU Shuguang,QI Dingman. 2007. Study of back-silting strength in the north passage channel of Changjiang Estuary. Acta Oceanologica Sinica, (2):56－64 |
| Study of back-silting strength in the north passage channel of Changjiang Estuary |
| Study of back-silting strength in the north passage channel of Changjiang Estuary |
| Received:September 08, 2006 Revised:December 05, 2006 |
| DOI： |
| Key words:empirical orthogonal function (EOF) Changjiang Estuary back-silting strength |
| 中文关键词: empirical orthogonal function (EOF) Changjiang Estuary back-silting strength |
| 基金项目: |
| Author Name | Affiliation | E-mail | | MA Gangfeng | Harbor, Waterway and Coast Engineering, Tongji University, Shanghai 200092, China
Estuarine and Coastal Scientific Research Institute, Ministry of Communications, Shanghai 201201, China | gangfeng_ma@hotmail.com | | LIU Shuguang | Harbor, Waterway and Coast Engineering, Tongji University, Shanghai 200092, China | | | QI Dingman | Estuarine and Coastal Scientific Research Institute, Ministry of Communications, Shanghai 201201, China | |
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| Abstract: |
| Temporal and spatial variations of the back-silting strength in the north passage channel of Changjiang Estuary are investigated using the empirical orthogonal function (EOF) method, with the aim to determine the imposed processes and time-scales.Data on back-silting quantity in every dredging unit of the channel have been collected since March 2000, predominantly once 15 d.The EOF analysis of the back-silting strength reveals two significant modes, which totally explain 58.33% of the overall variance, and the corresponding processes and time-scales.The first EOF mode shows a clear annual cycle which is determined by the riverine water and sediment discharge from the upstream.The second EOF mode reveals a close relation between the back-silting strength and project activities.Because the processes are greatly interrelated in this study case, the other EOF modes accounting for 41.67% of the total variance do not show clear processes and time-scales. |
| 中文摘要: |
| Temporal and spatial variations of the back-silting strength in the north passage channel of Changjiang Estuary are investigated using the empirical orthogonal function (EOF) method, with the aim to determine the imposed processes and time-scales.Data on back-silting quantity in every dredging unit of the channel have been collected since March 2000, predominantly once 15 d.The EOF analysis of the back-silting strength reveals two significant modes, which totally explain 58.33% of the overall variance, and the corresponding processes and time-scales.The first EOF mode shows a clear annual cycle which is determined by the riverine water and sediment discharge from the upstream.The second EOF mode reveals a close relation between the back-silting strength and project activities.Because the processes are greatly interrelated in this study case, the other EOF modes accounting for 41.67% of the total variance do not show clear processes and time-scales. |
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